CN214672724U

CN214672724U - Lithium ion battery

Info

Publication number: CN214672724U
Application number: CN202121024788.1U
Authority: CN
Inventors: 谭欣荣; 沈孝林; 吴进涛
Original assignee: Hunan Grepoow New Energy Co ltd
Current assignee: Hunan Grepoow New Energy Co ltd
Priority date: 2021-05-13
Filing date: 2021-05-13
Publication date: 2021-11-09
Anticipated expiration: 2031-05-13

Abstract

The utility model relates to a lithium ion battery field discloses a lithium ion battery, and it includes: the battery pack comprises a battery pack body and a battery pack body, wherein the battery pack body is formed by connecting a plurality of battery monomers in series or in parallel or a combination of series connection and parallel connection, and one end part of the battery pack body is electrically connected with a power supply outgoing line and a charging and discharging outgoing line; the casing, including epitheca, inferior valve and apron, relative lock and formation are in the cavity that has a breach about the shell mouth of epitheca, inferior valve, group battery body encapsulation is in the cavity, the apron is installed the breach department of cavity, respectively with epitheca, epitheca are connected, power supply lead-out wire, charge-discharge lead-out wire follow the apron with outlet between the breach stretches out. The lithium ion battery of the embodiment is more convenient to assemble and is more beneficial to improving the work efficiency.

Description

Lithium ion battery

Technical Field

The utility model relates to a lithium ion battery makes the field, especially relates to a lithium ion battery.

Background

With the wider application of lithium ion batteries, the more and more devices using the lithium ion batteries, and the lithium ion battery with an outlet led out of the shell is a widely applied lithium ion battery structure at present.

The shell of the lithium ion battery with the outgoing line led out from the shell in the prior art is composed of an upper shell and a lower shell, wherein shell openings of the upper shell and the lower shell are oppositely buckled, a line outgoing hole through which a power supply line passes is arranged in advance on one of the upper shell and the lower shell, when the lithium ion battery is assembled, an electric wire (one end of the electric wire is electrically connected with the battery body in a welding mode, the other end of the electric wire is provided with an external connecting terminal wider than the line outgoing hole) penetrates through the line outgoing hole in advance, when the lithium ion battery is assembled, the electric wire penetrating through the upper shell or the lower shell is welded on the battery body, then the upper shell and the lower shell are assembled, and the battery body is sealed and accounts between the upper shell and the lower shell, so that the lithium ion battery is assembled.

The inventor of the present invention has found in the research of the present invention that the prior art has the following defects:

1. the prior art needs to pierce the electric wire to the wire hole of casing in advance before welding the electric wire to the lithium ion battery group body, and the processing leads to the fact the material to pile up in advance, occupies production space.

2. When welding electric wire and battery body, need take the rubber case to weld together, it is very inconvenient to operate to influence production efficiency.

Disclosure of Invention

An object of the embodiment of the present invention is to provide a lithium ion battery, which is more convenient to assemble and more beneficial to improving work efficiency.

The embodiment of the utility model provides a lithium ion battery, include:

the battery pack comprises a battery pack body and a battery pack body, wherein the battery pack body is formed by connecting a plurality of battery monomers in series or in parallel or a combination of series connection and parallel connection, and one end part of the battery pack body is electrically connected with a power supply outgoing line and a charging and discharging outgoing line;

the shell comprises an upper shell, a lower shell and a cover plate,

the shell openings of the upper shell and the lower shell are buckled up and down relatively to form a cavity with a gap, the battery pack body is packaged in the cavity,

the cover plate is arranged at the notch of the cavity and is respectively connected with the upper shell and the upper shell, and the power supply leading-out wire and the charge and discharge leading-out wire extend out of a wire outlet between the cover plate and the notch.

Optionally, the side walls of the upper shell and the lower shell are mutually connected in a snap-fit manner to form the cavity.

Optionally, a first buckling part is arranged on the side wall of the lower shell, a second buckling part is arranged on the side wall of the upper shell, each second buckling part is respectively matched with the first buckling part in an opposite way,

the side walls of the upper shell and the lower shell are connected in a buckling mode through the first buckling part and the second buckling part.

Optionally, a protective groove is arranged on the top end surface of the side wall of the lower shell, the first buckling part is arranged on the side groove wall in the protective groove,

the side wall of the upper shell is inserted into the protective groove by a preset depth, and the second buckling part is buckled and connected with the first buckling part in the protective groove.

Optionally, the protection groove is provided on the top end surface of each side wall of the lower shell.

Optionally, a rib portion is arranged at the bottom end of the side wall of the upper shell, the second buckling portion is arranged in the lateral direction of the rib portion, the rib portion of the side wall of the upper shell extends into a protective groove of the lower shell to a preset depth, the rib portion is attached to the protective groove, and in the protective groove, the first buckling portion and the second buckling portion are in buckling connection.

Optionally, when the rib portion extends into the protective groove of the lower case, the outer surface of the sidewall of the upper case is flush with the outer surface of the sidewall of the lower case.

Optionally, the notch is provided at a left side end portion or a right side end portion of the upper case.

Optionally, lateral slots with open upper ends are respectively formed in the side walls on the upper shell and on the two sides of the notch, and the notches of the two lateral slots are opposite and face the notch.

Alternatively, the bottom end of the cover plate is inserted into the guard groove of the sidewall of the lower case by a predetermined depth.

Optionally, a third buckling part is further disposed in the lateral direction of the bottom end of the cover plate, and when the bottom end of the cover plate is inserted into the protective groove, the third buckling part is connected with the first buckling part in a buckling manner in the protective groove.

Optionally, one of the third buckling part and the first buckling part buckled with each other is a protrusion, and the other is a concave position or a hole part, and the protrusion is limited in the concave position or the hole part.

Optionally, the power supply outgoing line and the charge and discharge outgoing line respectively extend out of two outlet ports at two sides of the protruding structure spaced at the inner side of the cover plate.

Optionally, the two outlet ports are arranged at the corners of the top and the lateral ends of the upper shell,

at the lateral end where the notch is located, the side wall of the upper shell is inwardly deviated by a predetermined depth to form a lateral protection wall located in the notch,

the protruding structure of the cover plate extends into the gap and is attached to the lateral protective wall.

Optionally, a fourth buckling part and a fifth buckling part which are opposite and can be matched are respectively arranged on the protruding structure of the cover plate and the facing surface of the lateral protection wall, and the fourth buckling part and the fifth buckling part are in buckling connection.

Optionally, one of the fourth buckling part and the fifth buckling part is a protrusion, the other is a recess, and the protrusion is limited in the recess or the hole.

Optionally, one of the first buckling part and the second buckling part buckled with each other is a protrusion, the other one is a concave position or a hole part, and the protrusion is limited in the concave position or the hole part.

Optionally, the housing is a rubber shell.

It can be seen from the above that, with the lithium ion battery shell structure of this embodiment, because a notch is reserved between the upper shell and the lower shell, the power supply lead wire and the charge/discharge lead wire extend out, in the preparation process of the lithium ion battery, the power supply lead wire and the charge/discharge lead wire can be directly welded on the battery pack body before entering the shell, when entering the shell, the power supply lead wire and the charge/discharge lead wire extend out from the notch, then the cover plate 3 is installed and connected with the notch and the upper shell and the lower shell respectively to form the outlet at intervals on the notch, the power supply lead wire and the charge/discharge lead wire extend out from the outlet, so as to position the power supply lead wire and the charge/discharge lead wire, and protect the battery pack body structure and the circuit structure exposed at the notch. Compared with the technical scheme that the wire outlet holes are preset in the upper shell or the lower shell in the prior art, the lithium ion battery structure is more convenient to produce, beneficial to improving the work efficiency, more beneficial to orderly storing preprocessed materials and saving the storage space.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, do not constitute an undue limitation on the invention.

Fig. 1 is a schematic diagram of an explosion structure of a lithium ion battery provided in an embodiment of the present invention;

fig. 2 is a schematic view of an assembly structure of an upper shell and a lower shell of a lithium ion battery provided by an embodiment of the present invention;

fig. 3 is a schematic view of a cover plate assembly structure of a lithium ion battery provided in an embodiment of the present invention;

fig. 4 is a schematic perspective view of a lithium ion battery provided in an embodiment of the present invention;

fig. 5 is a schematic perspective view of an upper case according to an embodiment of the present invention;

fig. 6 is a schematic side view of the upper case according to the embodiment of the present invention;

fig. 7 is a schematic view of an internal structure of an upper case according to an embodiment of the present invention;

fig. 8 is a schematic top view of the lower case according to the embodiment of the present invention;

fig. 9 is a schematic side view of a lower casing according to an embodiment of the present invention;

fig. 10 and 11 are schematic perspective views of a lower shell according to an embodiment of the present invention;

fig. 12 and 13 are schematic perspective views of a cover plate according to an embodiment of the present invention;

fig. 14 is a schematic top view of a cover plate according to an embodiment of the present invention;

fig. 15 is a schematic bottom view of a cover plate according to an embodiment of the present invention.

Reference numerals:

1: an upper shell; 12: a second fastening part; 11: a rib portion; 13: slotting in a lateral direction;

14: a lateral retaining wall; 15: a fifth buckling part; 5: a notch;

2: a lower case; 22: protecting the groove; 21: a first fastening part;

3: a cover plate; 31: a raised structure; 33: a third buckle part; 34: a fourth fastening part;

4: a battery pack body; 41: a power supply outlet; 42: and (6) charging and discharging lead wires.

Detailed Description

The invention will be described in detail with reference to the drawings and specific embodiments, wherein the exemplary embodiments and descriptions are provided to explain the invention, but not to limit the invention.

Example 1

See fig. 1-15.

The present embodiment provides a lithium ion battery, including: a battery pack body 4, and a case for enclosing the battery pack body 4. The battery pack body 4 is formed by connecting a plurality of battery cells in series, in parallel, or in a combination of series and parallel, to form an integral battery pack body 4, and a power supply lead 41 for electrically connecting to an external power consumption device and a charge/discharge lead 42 for controlling charge/discharge are electrically connected to one end of the battery pack body 4. One end of the power supply lead wire 41 and one end of the charge and discharge lead wire 42 are respectively welded on the charge and discharge circuit board of the battery pack body 4, and the other ends are respectively provided with a connector matched with an external device or an external charge and discharge interface. In the preparation of the lithium ion battery of the present embodiment, the power supply lead wire 41 and the charge/discharge lead wire 42 may be welded to the battery pack body 4 in advance before the battery pack body 4 is housed.

The casing of this embodiment mainly includes epitheca 1, inferior valve 2 and apron 3, and wherein the shell mouth of epitheca 1 is downward, and the shell mouth of inferior valve 2 is upwards, and the opposite lock is in the same place about the shell mouth of epitheca 1 and inferior valve 2, forms one and reserves the cavity of breach 5. When the battery pack body 4 is inserted into the case, the battery pack body 4 is specifically packaged in the cavity formed by the upper case 1 and the lower case 2, so that the power supply lead wire 41 and the charge and discharge lead wire 42 welded on the battery pack body 4 extend out from the notch 5 of the cavity. Then, the cover plate 3 is mounted to the notch 5, so that the cover plate 3 is connected to the upper case 1 and fixed to the notch 5 of the cavity, and the power supply lead 41 and the charge and discharge lead 42 at the notch 5 extend out from the outlet reserved between the cover plate 3 and the notch 5.

As can be seen from the above, with the housing structure of the lithium ion battery of this embodiment, since the gap 5 from which the power supply lead 41 and the charge/discharge lead 42 extend is reserved between the upper housing 1 and the lower housing 2, in the process of manufacturing the lithium ion battery, the power supply lead 41 and the charge/discharge lead 42 can be directly welded to the battery pack body 4 before entering the housing, when entering the housing, the power supply lead 41 and the charge/discharge lead 42 extend from the gap 5, then the cover plate 3 is mounted and connected to the gap 5 and the upper housing 1 and the lower housing 2 respectively to form outlets on the gap 5 at intervals, and the power supply lead 41 and the charge/discharge lead 42 extend from the outlets to position the power supply lead 41 and the charge/discharge lead 42 and protect the battery pack body 4 structure and the circuit structure exposed at the gap 5. Compared with the technical scheme that the wire outlet holes are preset in the upper shell 1 or the lower shell 2 in the prior art, the lithium ion battery structure is more convenient to produce, beneficial to improving work efficiency, more beneficial to orderly storing preprocessed materials and saving storage space.

As an illustration of the present embodiment, the upper casing 1 and the lower casing 2 of the present embodiment can be fastened and fixed together by the fastening portions facing each other on the side walls of the upper casing 1 and the lower casing 2, and compared with the connection methods such as screw fixation, the fastening connection is adopted to further improve the convenience of connection and improve the assembly efficiency.

As an illustration of the present embodiment, but not limited to, a guard groove 22 having a notch opening at the top end surface of the side wall and a depth from top to bottom may be provided in the side wall of the lower case 2, and a locking portion (referred to as a first locking portion 21) may be provided in either or both of the groove walls in the guard groove 22. Correspondingly, when the assembly, the shell mouth of inferior valve 2 is up, assemble battery pack body 4 in inferior valve 2, the shell mouth of epitheca 1 lock in the top of inferior valve 2 downwards, the lateral wall of epitheca 1 inserts the dado 22 predetermined depth of the lateral wall of epitheca 1, be equipped with on the lateral wall of epitheca 1 stretching into in dado 22 with first buckle 21 assorted buckle portion (writing as second buckle portion 12), epitheca 1, inferior valve 2 first buckle portion 21, second buckle portion 12 looks buckle connection in dado 22, fix epitheca 1, inferior valve 2 together, realized the encapsulation of battery pack body 4.

Adopt this embodiment technical scheme, because the mutual buckle position of epitheca 1, inferior valve 2 sets up in protecting groove 22, the lateral wall of epitheca 1 is injectd and effectively avoids the lateral wall of epitheca 1 to warp or shift and lead to each other the buckle position to drop and lead to the technical problem of pine shell in protecting groove 22, and this scheme of adoption is favorable to improving the reliability that the buckle of epitheca 1, inferior valve 2 is connected.

As an indication of this embodiment, the top end surfaces of the peripheral side walls of the lower case 2 of this embodiment are all provided with the protection slots 22 for the side walls of the upper case 1 to extend into, so that the protection slots 22 surround a circle along the case opening of the lower case 2 at the top of the side walls of the lower case 2, and the peripheral side walls of the upper case 1 all extend into the protection slots 22 and are connected and fixed with the buckling parts in the protection slots 22 in a buckling manner.

As an illustration of the present embodiment, a rib 11 surrounding the bottom opening of the upper shell 1 by one turn may be disposed at the bottom end of the side wall of the upper shell 1, and a plurality of second locking portions 12 are disposed in the lateral direction of the surrounding rib 11, when the upper shell 1 and the lower shell 2 are locked, specifically, the rib 11 at the bottom end of the side wall of the upper shell 1 is inserted into a protection groove 22 surrounding the top opening of the lower shell 2, so that the rib 11 is attached to the lateral groove wall in the protection groove 22, and in the protection groove 22, the second locking portion 12 of the rib 11 is locked and connected to and fixed with the first locking portion 21 disposed on the lateral groove wall in the protection groove 22.

As an illustration of the present embodiment, when the upper case 1 and the lower case 2 are engaged with each other, the outer surfaces of the sidewalls of the upper case 1 and the lower case 2 exposed outside are preferably flush with each other, so that the upper case 1 and the lower case 2 are in an integral structure, thereby improving the flatness of the appearance structure of the lithium ion battery and facilitating the installation of the lithium ion battery on the electric device.

As an illustration of the present embodiment, the notch 5 for leading out the power supply lead wire 41 and the charge/discharge lead wire 42 of the present embodiment is provided at the left side width end or the right side width end of the upper case 1 having a narrow width, and is matched with the lead wire outlet end of the battery pack body 4, thereby improving the convenience of assembly.

As an indication of this embodiment, lateral slots 13 with open upper ends are formed in the side walls of the upper case 1 located at the front and rear sides of the notch 5 in this embodiment, the notches of the lateral slots 13 face opposite directions and face inward toward the notch 5, so that when the upper case 1 and the lower case 2 are assembled and the cover plate 3 is assembled, the cover plate 3 is inserted into the lateral slots 13 of the upper case 1 from top to bottom, the edges of the two sides of the cover plate 3 slide down to a predetermined position along the lateral slots 13, the cover plate 3 is installed and fixed, the cover plate 3 is limited between the lateral slots 13, and the cover plate 3 is convenient to install and position.

As an indication of this implementation, the bottom end of the cover plate 3 is further provided with a fastening portion (denoted as a third fastening portion 33) that can be matched with the first fastening portion 21 in the protective groove 22 on the side wall of the lower case 2, when the cover plate 3 is inserted from top to bottom, the bottom end edge of the cover plate 3 is inserted into the protective groove 22 on the side wall of the lower case 2 below the cover plate, the third fastening portion 33 is fixedly connected with the first fastening portion 21, the bottom end of the cover plate 3 is firmly fixed on the lower case 2, the cover plate 3 is prevented from sliding out, no external fixing component is needed, and the assembly efficiency of the cover plate 3 is improved.

As an indication of this embodiment, at least one protrusion structure 31 may be further disposed on the inner side of the cover plate 3 facing the battery pack body 4, two lines of outlets are respectively formed on two sides of the protrusion structure 31, so that when the cover plate 3 covers the notch 5 of the upper case 1, the power supply lead 41 and the charging/discharging lead 42 of the battery pack body 4 respectively extend out from different lines of outlets on two sides of the protrusion structure 31 at intervals, thereby further facilitating the outgoing of the lithium ion battery, and facilitating the identification and external connection of the outgoing lines.

As an illustration of the present embodiment, but not limited to, two outlets may be disposed at the corner positions of the top and the lateral ends of the upper case 1, such that a part of the side wall of the upper case 1 at the lateral ends is moved into the notch 5 to form a lateral protection wall 14 located inside the notch 5, after the upper case 1 and the lower case 2 are fastened, the necessary outlet structure at the lateral ends of the case is exposed in the notch 5, and the lateral protection wall 14 separates the battery pack body 4 and the circuit board structure inside the notch 5 inside the lateral protection wall 14 to protect the battery pack body 4 and the circuit board structure. In order to further improve the connection fastening and convenience of the cover plate 3 and the upper shell 1, the protruding structure 31 arranged on the inner side of the cover plate 3 is matched with the lateral protective wall 14 of the upper shell 1, for example, when the profile of the lateral protective wall 14 of the upper cover facing the notch 5 is in a concave (or convex) structure, correspondingly, the profile of the cover plate 3 facing the notch 5 is in a convex (or concave) structure, so that the protruding structure 31 of the cover plate 3 is attached to the lateral protective wall 14 of the upper shell, the connection fastening of the cover plate 3 and the upper shell 1 is improved, the gap of the upper shell 1 is reduced, and the dustproof and moistureproof performance is improved.

As an illustration of the present embodiment, fastening portions (respectively referred to as a fourth fastening portion 34 and a fifth fastening portion 15) that can be fastened to each other are further disposed on the lateral protruding structure 31 of the cover plate 3 and the attached end surface of the lateral protection wall 14 of the upper case 1, when the cover plate 3 is inserted from top to bottom, and the protruding structure 31 of the cover plate 3 slides to a predetermined position along the lateral protection wall 14 of the upper cover, the fourth fastening portion 34 and the fifth fastening portion 15 are fastened to be locked to each other, so as to lock the cover plate 3 on the lateral protection wall 14, thereby achieving multi-angle locking of the cover plate 3, avoiding displacement or falling, and improving the fastening degree of connection.

As an indication of the embodiment, the upper casing 1, the lower casing 2, and the cover plate 3 of the casing of the embodiment are all supported by plastic, so that on one hand, the weight of the lithium ion battery is reduced, and on the other hand, the fastening portions on the upper casing 1, the lower casing 2, and the cover plate 3 have certain deformability, thereby improving the fastening performance between the fastening positions.

As an illustration of the present embodiment, one of the fastening portions of the present embodiment that are fastened to each other is a protruding portion, and the other one is a matching hole portion or a matching recess, and when the fastening device is assembled, the protruding portion is slightly deformed, and the protruding portion is pushed into the corresponding recess or hole portion and then is deformed again, and is fastened in the recess or hole portion without external force, so as to achieve the fastening effect of limiting and avoiding displacement.

The above-described embodiments do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the above-described embodiments should be included in the protection scope of the technical solution.

Claims

1. A lithium ion battery, comprising:

the shell comprises an upper shell, a lower shell and a cover plate,

2. The lithium ion battery according to claim 1,

the side walls of the upper shell and the lower shell are mutually connected in a buckling mode to form the cavity.

3. The lithium ion battery according to claim 2,

the side wall of the lower shell is provided with a first buckling part, the side wall of the upper shell is provided with a second buckling part, each second buckling part is respectively and oppositely matched with the first buckling part,

4. The lithium ion battery according to claim 3,

a protective groove is arranged on the top end surface of the side wall of the lower shell, the first buckling part is arranged on the side groove wall in the protective groove,

5. The lithium ion battery according to claim 4,

the top end face of each side wall of the lower shell is provided with the protection groove.

6. The lithium ion battery according to claim 4 or 5,

the bottom end of the side wall of the upper shell is provided with a rib part, the second buckling part is arranged in the side direction of the rib part, the rib part of the side wall of the upper shell extends into the protective groove of the lower shell to a preset depth, the rib part is attached to the protective groove, and the first buckling part and the second buckling part are buckled and connected in the protective groove.

7. The lithium ion battery according to claim 6,

when the rib part extends into the protective groove of the lower shell, the outer surface of the side wall of the upper shell is level with the outer surface of the side wall of the lower shell.

8. The lithium ion battery according to claim 1,

the gap is arranged at the left side end part or the right side end part of the upper shell.

9. The lithium ion battery according to claim 8,

lateral grooves with open upper ends are respectively arranged on the side walls of the upper shell and the side walls of the upper shell, which are positioned on two sides of the notch, and the notches of the two lateral grooves are opposite and face the notch.

10. The lithium ion battery according to claim 4,

the bottom end of the cover plate is inserted into the protective groove of the side wall of the lower case by a predetermined depth.

11. The lithium ion battery according to claim 10,

and a third buckling part is arranged on the lateral side of the bottom end of the cover plate, and when the bottom end of the cover plate is inserted into the protective groove, the third buckling part is buckled and connected with the first buckling part in the protective groove.

12. The lithium ion battery according to claim 11,

one of the third buckling part and the first buckling part which are buckled with each other is a protrusion, the other one is a concave position or a hole part, and the protrusion is limited in the concave position or the hole part.

13. The lithium ion battery according to claim 1,

the power supply outgoing line and the charge and discharge outgoing line respectively extend out of two outlet ports at two sides of the protruding structure at the inner side of the cover plate at intervals.

14. The lithium ion battery according to claim 13,

the two outlet ports are arranged at the corners of the top and the lateral end parts of the upper shell,

15. The lithium ion battery according to claim 14,

and a fourth buckling part and a fifth buckling part which are opposite and can be matched are respectively arranged on the protruding structure of the cover plate and the facing surface of the lateral protective wall, and the fourth buckling part and the fifth buckling part are in buckling connection.

16. The lithium ion battery according to claim 15,

one of the fourth buckling part and the fifth buckling part is a protrusion, the other one is a concave part, and the protrusion is limited in the concave part or the hole part.

17. The lithium ion battery according to claim 3,

one of the first buckling part and the second buckling part which are mutually buckled is a bulge, the other one of the first buckling part and the second buckling part is a concave position or a hole part, and the bulge is limited in the concave position or the hole part.

18. The lithium ion battery according to claim 1,

the shell is a rubber shell.